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Thread: really confused PLEASE HELP

  1. #1
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    really confused PLEASE HELP

    Ok I have this word problem i am confused on. It says a test has 4 choices a, b, c, and d if a student answers all 3 questions what is the probability they got all of them correct???

    Any help would be greatly appreciated.
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  2. #2
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    Quote Originally Posted by BaBrown1s View Post
    Ok I have this word problem i am confused on. It says a test has 4 choices a, b, c, and d if a student answers all 3 questions what is the probability they got all of them correct???

    Any help would be greatly appreciated.
    Probability of getting any one question right when choosing at random is $\displaystyle 0.25$ (four possibilities, only one of which is correct).

    Probability of getting three out of three right is $\displaystyle 0.25^3$.

    CB
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